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a t�h� � @ sN d Z ddlmZ ddlmZ ddlmZ G dd� de�ZG dd� dee�Zd S ) a Memory Backends --------------- Provides simple dictionary-based backends. The two backends are :class:`.MemoryBackend` and :class:`.MemoryPickleBackend`; the latter applies a serialization step to cached values while the former places the value as given into the dictionary. � )� CacheBackend)�DefaultSerialization)�NO_VALUEc @ sH e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dS )� MemoryBackenda� A backend that uses a plain dictionary. There is no size management, and values which are placed into the dictionary will remain until explicitly removed. Note that Dogpile's expiration of items is based on timestamps and does not remove them from the cache. E.g.:: from dogpile.cache import make_region region = make_region().configure( 'dogpile.cache.memory' ) To use a Python dictionary of your choosing, it can be passed in with the ``cache_dict`` argument:: my_dictionary = {} region = make_region().configure( 'dogpile.cache.memory', arguments={ "cache_dict":my_dictionary } ) c C s |� di �| _d S )NZ cache_dict)�pop�_cache)�self� arguments� r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/dogpile/cache/backends/memory.py�__init__4 s zMemoryBackend.__init__c C s | j �|t�S �N�r �getr �r �keyr r r r 7 s zMemoryBackend.getc s � fdd�|D �S )Nc s g | ]}� j �|t��qS r r )�.0r �r r r � <listcomp>; � z+MemoryBackend.get_multi.<locals>.<listcomp>r )r �keysr r r � get_multi: s zMemoryBackend.get_multic C s || j |< d S r )r )r r �valuer r r �set= s zMemoryBackend.setc C s |� � D ]\}}|| j|< qd S r )�itemsr )r �mappingr r r r r � set_multi@ s zMemoryBackend.set_multic C s | j �|d � d S r �r r r r r r �deleteD s zMemoryBackend.deletec C s |D ]}| j �|d � qd S r r )r r r r r r � delete_multiG s zMemoryBackend.delete_multiN) �__name__� __module__� __qualname__�__doc__r r r r r r r r r r r r s !r c @ s e Zd ZdZdS )�MemoryPickleBackenda� A backend that uses a plain dictionary, but serializes objects on :meth:`.MemoryBackend.set` and deserializes :meth:`.MemoryBackend.get`. E.g.:: from dogpile.cache import make_region region = make_region().configure( 'dogpile.cache.memory_pickle' ) The usage of pickle to serialize cached values allows an object as placed in the cache to be a copy of the original given object, so that any subsequent changes to the given object aren't reflected in the cached value, thus making the backend behave the same way as other backends which make use of serialization. The serialization is performed via pickle, and incurs the same performance hit in doing so as that of other backends; in this way the :class:`.MemoryPickleBackend` performance is somewhere in between that of the pure :class:`.MemoryBackend` and the remote server oriented backends such as that of Memcached or Redis. Pickle behavior here is the same as that of the Redis backend, using either ``cPickle`` or ``pickle`` and specifying ``HIGHEST_PROTOCOL`` upon serialize. .. versionadded:: 0.5.3 N)r r! r" r# r r r r r$ L s r$ N)r# �apir r r r r$ r r r r �<module> s :
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